DataGridView (windows Forms) - Master/Details

Hi,

I'm using a DataGridView Control and I want to add an unbound column (text or combobox) to display a list of details depending on the value contained in another column.

How can I reference the content of a specific column on the same row to filter what should appear in the details' list?

I'm trying to use something like this:

myUnboundColumn.Datasource = MyClass.GetdetailsForID(....);

but what to put to refer to another value on the same row?

Thank you very much in advance for your help!

Cheers,
Daniel